A sealing assembly for forming a seal about an elongate object includes a resilient seal member and a loading mechanism. The resilient seal member includes an inner wall surface defining a channel to receive the elongate object. The seal member has first and second opposed sides. The loading mechanism includes a first pressure member on the first side of the seal member; a second pressure member on the second side of the seal member; a biasing member on the second side of the seal member and interposed between the seal member and the second pressure member; and an adjustable displacement mechanism accessible and operable from the first side of the seal member to displace the first and second pressure members relative to one another to selectively apply a compressive load to the seal member such that the inner wall surface is expanded inwardly to exert a sealing pressure on the elongate object.
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1. A sealing assembly for forming a seal about an elongate object, the sealing assembly comprising:
a) a resilient seal member including an inner wall surface defining a channel to receive the elongate object, the seal member having first and second opposed sides;
b) a base member disposed on the second side of the seal member;
c) a loading mechanism including:
a first pressure member on the first side of the seal member;
a second pressure member on the second side of the seal member and including a threaded portion;
a biasing member on the second side of the seal member and interposed between the base member and the second pressure member; and
an adjustable displacement mechanism including a threaded member that threadedly engages the threaded portion of the second pressure member and is rotatable relative to the base member and the second pressure member to axially displace the first and second pressure members relative to one another to selectively apply a compressive load to the seal member such that the inner wall surface is expanded inwardly to exert a sealing pressure on the elongate object; and
d) an anti-rotation feature to limit rotation of the second pressure member relative to the base member while permitting relative axial displacement between the base member and the second pressure member.
11. A sealing assembly for forming a seal about an elongate object, the sealing assembly comprising:
a) a resilient seal member including an inner wall surface defining a channel to receive the elongate object, the seal member having first and second opposed sides;
b) a loading mechanism including:
a first pressure member on the first side of the seal member;
a second pressure member on the second side of the seal member;
a biasing member on the second side of the seal member and interposed between the seal member and the second pressure member; and
an adjustable displacement mechanism accessible and operable from the first side of the seal member to displace the first and second pressure members relative to one another to selectively apply a compressive load to the seal member such that the inner wall surface is expanded inwardly to exert a sealing pressure on the elongate object; and
c) a base member interposed between the second side of the seal member and the biasing member, wherein the first and second pressure members are each axially displaceable relative to the base member;
wherein the displacement mechanism includes a threaded member that is rotatable relative to the base member to axially converge the first and second pressure plates to apply the compressive load to the seal member; and
wherein the sealing assembly includes an anti-rotation feature to limit rotation of the second pressure member relative to the base member while permitting relative axial displacement between the base member and the second pressure member, and wherein the second pressure member includes a threaded portion threadedly engaging the threaded member.
2. The sealing assembly of
3. The sealing assembly of
the base member includes a side wall and defines a cavity; and
when the displacement mechanism applies the compressive load to the seal member, an outer surface of the seal member expands outwardly to form a seal with the side wall of the base member.
4. The sealing assembly of
5. The sealing assembly of
6. The sealing assembly of
7. The sealing assembly of
the seal member includes a second inner wall surface defining a second channel to receive a second elongate object; and
when the loading mechanism applies the compressive load to the seal member, the second inner wall surface is expanded inwardly to exert a sealing pressure on the second elongate object.
8. The sealing assembly of
10. The sealing assembly of
12. The sealing assembly of
14. The sealing assembly of
15. The sealing assembly of
the base member includes a side wall and defines a cavity; and
when the displacement mechanism applies the compressive load to the seal member, an outer surface of the seal member expands outwardly to form a seal with the side wall of the base member.
16. The sealing assembly of
17. The sealing assembly of
18. The sealing assembly of
19. The sealing assembly of
the seal member includes a second inner wall surface defining a second channel to receive a second elongate object; and
when the loading mechanism applies the compressive load to the seal member, the second inner wall surface is expanded inwardly to exert a sealing pressure on the second elongate object.
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The present invention relates to sealing devices and, more particularly, to sealing devices for providing a seal between an opening in an object and an elongate article such as a cable.
It is often necessary to form a seal between an elongate object such as a cable and an opening in an object such as a pipe or splice enclosure. For example, in a telecommunications infrastructure, electrical connectors or splices may be housed in enclosures to protect them from harsh environments. It may be necessary or desirable to seal the enclosure against in the ingress of water of the like. In particular, the enclosure may be provided with a sealing device to form a seal about each cable or wire at its entry into the enclosure.
According to embodiments of the present invention, a sealing assembly for forming a seal about an elongate object includes a resilient seal member and a loading mechanism. The resilient seal member includes an inner wall surface defining a channel to receive the elongate object. The seal member has first and second opposed sides. The loading mechanism includes: a first pressure member one the first side of the seal member; a second pressure member on the second side of the seal member; a biasing member on the second side of the seal member and interposed between the seal member and the second pressure member; and an adjustable displacement mechanism accessible and operable from the first side of the seal member to displace the first and second pressure members relative to one another to selectively apply a compressive load to the seal member such that the inner wall surface is expanded inwardly to exert a sealing pressure on the elongate object.
According to further embodiments of the present invention, a sealing assembly for forming a seal about an elongate object includes a resilient seal member, a base member, and a loading mechanism. The resilient seal member includes an inner wall surface defining a channel to receive the elongate object. The seal member has first and second opposed sides. The base member is disposed on the second side of the seal member. The loading mechanism includes: a first pressure member on the first side of the seal member; a second pressure member on the second side of the seal member and including a threaded portion; a biasing member on the second side of the seal member and interposed between the base member and the second pressure member; and an adjustable displacement mechanism including a threaded member that threadedly engages the threaded portion of the second pressure member and is rotatable with relative to the base member and the second pressure member to axially displace the first and second pressure members relative to one another to selectively apply a compressive load to the seal member such that the inner wall surface is expanded inwardly to exert a sealing pressure on the elongate object. The sealing assembly further includes an anti-rotation feature to limit rotation of the second pressure member relative to the base member while permitting relative axial displacement between the base member and the second pressure member.
According to further embodiments of the present invention, a sealing assembly for forming a seal about an elongate object includes a resilient seal member and a loading mechanism. The resilient seal member includes an inner wall surface defining a channel to receive the elongate object. The loading mechanism is adapted to selectively apply a compressive load to the seal member such that the inner wall surface is expanded inwardly to exert a sealing pressure on the elongate object. The loading mechanism includes a crest to crest continuous wave spring to apply a compressive biasing load to the seal member.
According to further embodiments of the present invention, a sealing assembly for forming a seal about an elongate object includes a resilient sealing member and a loading mechanism. The resilient seal member includes an inner wall surface defining a channel to receive the elongate object. The seal member is formed of a material having a durometer of at least as hard as about 10 Shore A. The loading mechanism is adapted to selectively apply a compressive load to the seal member such that the inner wall surface is expanded inwardly to exert a sealing pressure on the elongate object. The loading mechanism includes a biasing mechanism adapted to apply a compressive biasing load to the seal member.
Further features, advantages and details of the present invention will be appreciated by those of ordinary skill in the art from a reading of the figures and the detailed description of the preferred embodiments that follow, such description being merely illustrative of the present invention.
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which illustrative embodiments of the invention are shown. In the drawing, the relative sized of regions or features may be exaggerated for clarity. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It will be understood that when an element is referred to as being “coupled” or “connected” to another element, it can be directly coupled or connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being “directly coupled” or “directly connected ” to another element, there are no intervening elements present. Like numbers refer to like elements throughout. As used herein the term “and/or” includes any and all combinations of one or more of the associated listed items. Well-known functions or constructions may not be described in detail for brevity and/or clarity.
In addition, spatially relative terms, such as “under”, “below”, “lower”, “over”, “upper” and the like, may be used herein for ease of description to describe one element or features'relationship to another elements(s) or feature(s) as illustrate in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “under”or “beneath” other elements or features would then be oriented “over” the other elements or features. Thus, the exemplary term “under” can encompass both and orientation of over and under. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by on of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
With reference to FIGS 1-9, a sealing assembly 100 according to embodiments of the present invention is shown therein. The sealing assembly 100 may for a part of an enclosure assembly 50 to form a seal or seals between one or more elongate objects, such as a cable 10 (
The sealing assembly 100 includes a housing member or base member 110, a plurality of resilient seal members 1130, and a plurality of loading mechanism 160 (
With reference to
The base member 110 may be formed of any suitable material . According to some embodiments, the base member 110 is a molded polymeric material. Suitable polymeric materials include polyolefins (e.g., polyethylene, polypropylene and copolymers thereof), acrylonitrile butadiene styrene copolymers (ABS), polybutylene terephthalate, nylon, polycarbonate, polyvinyl chloride and alloys or combinations of the aforementioned polymers or similar engineering polymers.
With reference to
According to some embodiments, the material of the seal members 130 has a durometer at least as hard as 10 Shore A. According to some embodiments, the material of the seal members 130 has a durometer no harder than 70 Shore A. According to some embodiments, the durometer is between about 20 and 40 Shore A.
The seal members 130 may be of unitary construction as illustrated. As illustrated, the seal members 130 are substantially identical and one will be described hereinafter, it being appreciated that the description that follows applies equally to the remaining seal members 130. However, according to further embodiments, the seal members 130 may differ from one another in material and/or configuration.
Referring now to
The outer dimension D3 (
The channel 140 may be substantially identical or different. Referring to
According to some embodiments, the pitch P (
According to some embodiments, the depth H (
According to some embodiments, the inner diameter D1 (
According to some embodiments, the length L1 (
Each of the sealing subassemblies 101 includes a loading mechanism 160 (
The pressure member 150 (
The pressure member 150 may be formed of any suitable material. According to some embodiments, the pressure member 150 is formed of rigid polymeric material. According to some embodiments, the pressure member 150 is formed of stainless steel, aluminum, polymeric materials or glass reinforced polymeric materials such as poly (oxymethylene), polyvinylchloride, polypropylene, nylon, or polybutylene terephthalate. The pressure member 150 may be formed of a molded material.
An X-shaped platform 192 (
The biasing member 170 is mounted on the rear side of the bottom wall 118B of the base member 110. According to some embodiments, the biasing member 170 is a spring member. According to some embodiments, the biasing member 170 is an annular crest-to-crest continuous wave spring as shown. An exemplary crest-to-crest continuous wave spring 170 is shown in more detail in
According to some embodiments, the spring 170 has a free (i.e., zero load) height L4 in the range of from about 0.5 to 0.7 inch. According to some embodiments, the spring 170 has an inner diameter D7 in the range of from about 1.4 to 1.6 inches. According to some embodiments, the spring 170 has an outer diameter D8 in the range of from about 1.9 to 2.1 inches.
According to some embodiments, the spring 170 has a spring rate of between about 350 to 390 lbs/in.
According to some embodiments, the spring 170 has a load of at least 100 lbs. at 0.3 inch work height.
According to some embodiments, the spring 170 has between about 5 and 7 turns. According to some embodiments, the spring 170 has between about 7 and 11 half waves per turn.
According to some embodiments, the spring 170 has a wire thickness of between about 0.2 to 0.28 inch.
The spring 170 may be formed of any suitable material. According to some embodiments, the spring 170 is formed of a metal such as steel, stainless steel or bronze. The spring 170 may have plain ends (as shown) or shimmed ends.
The spring plate 180 is positioned against the spring 170 opposite the bottom wall 118B. The spring plate 180 has a front side 182 and a rear side 184. Spaces apart holes 186, a center hole 187, and positioning holes 189 extend axially through the spring plate 180. The spring plate 180 is mounted on the rear side of the spring 170 opposite the front side 134 (
The spring plate 180 may be formed of any suitable material. According to some embodiments, the spring plate 180 is formed of a rigid polymeric material. According to some embodiments, the spring plate is formed of stainless steel, aluminum, polymeric materials or glass reinforced polymeric materials such as poly(oxymethylene), polyvinylchloride, polypropylene, nylon, or polybutylene terephthalate. The spring plate 180 may be formed of a molded material.
The bolt 162 includes a head 164 and a shank 166. The shank 166 includes a smooth portion 166A and a threaded portion 166B/ As shown in
The bolt 162 may be formed of any suitable material. According to some embodiments, the bolt 162 is formed of a metal such as steel.
According to some embodiments, the diameters of the openings 118A, 156, and 186 are substantially the same as or larger than the diameter D2 (
With reference to
As noted above, the enclosure assembly 50 and the sealing assembly 100 may be used with any suitable elongate object, and are particularly contemplated for use with cables such as the cable 10 illustrated in
The enclosure assembly 50 may be used and assembled in the following manner. The enclosure assembly 50 may be mounted in a pressurized or non-pressurized cabinet, for example. Generally, one or more cable 10 are inserted through the base member 110 as discussed in more detail below. The inserted ends of the cables 10 are connected to a connector block or otherwise terminated or addressed, and the cover 52 is mounted on the base member 110 with the O-ring 53 in place. the clamp 56 is applied about the cover 52 to secure the cover 52 to the base member 110.
The cable 10 is then inserted along the axis A-A through the selected channel 140, the aligned pressure member opening 156, the aligned base member opening 118A, the spring hole 172, and the aligned spring plate hole 186 as shown in
According to some embodiments, the seal member 130 is not loaded by the loading mechanism 160 while the cable 10 is being inserted. Alternatively, the seal member 130 may be partially axially compressed by the loading mechanism 160 while the cable 10 is being inserted.
Once the cable 10 is in place, the user can access and operate the bolt 162 from the front side of the sealing assembly 100. More particularly, the user can rotate the bolt 162, which cooperates with the treaded spring plate 180 to apply an axial tensioning load that draws or converges the pressure member 150 and the spring plate 180 axially toward one another ant toward the bottom wall 118B as shown in
Additionally, the spring 170 is axially compressed by the rotation of the bolt 162 to a compressed or loaded position as shown in
According to some embodiments, the loading mechanism 160 is adapted to axially compress the spring 170 to a length L3 (
The engagements between the polygonal seal member 130, the polygonal pressure member 150, and the complementary polygonal side wall 118C may serve as a limiting or anchoring mechanism to prevent or inhibit rotation of the seal member 130 and the pressure member 150 relative to one another and the base member 110.
One or more additional cables 10 may be inserted through the other channels 140 of the seal member 130 before tightening the loading mechanism 160. When the bold 162 is rotated, each of the channels 140 will simultaneously contract to form a seal about the respective cable 10.
The channel 140 that are not used to receive cables can remain sealed by the caps 133. Alternatively, the channels 140 that are not used to receive cable may be plugged with plug rods, stoppers or the like, which may form seals with the seal member 130 in the same manner as with a cable.
According to some embodiments, the loading mechanism 160 is adapted to provide a load on the seal member 130 of at least about 40 pounds. According to some embodiments, the loading mechanism 160 is adapted to provide a load of between about 40 and 80 pounds. According to some embodiments, the loading mechanism 160 is adapted to axially compress the seal member 130 to a length L2 (
The threaded arrangement of the bolt 162 and spring plate 180 may allow for a continuous range of adjustment of the compressive load within a prescribed range. The platform 192 may serve to positively limit the adjustment of the loading mechanism 160. Alternatively or additionally, the partial threading of the shank 166 may serve as an adjustment limiter.
Sealing assemblies according to embodiments of the present invention may provide a number of advantages. The relative arrangement of the bold 162, the pressure member 150, the seal member 130, the spring 170 and the spring plate 180 allow for convenient operation of the loading mechanism 160 while also locating the spring 170 internally of the enclosure assembly 50. The relative arrangement may also permit use of the sealing assembly 100 without the spring 170, so that only one set of parts need be manufactured for use with or without spring biasing. This may provide significant cost savings by eliminating the need to manufacture alternate components.
The crest to crest continuous wave spring may provide increased spring force per unit axial deflection as compared to, for example, a coil spring. Thus, the crest to crest continuous wave spring may shorten the compression distance needed to achieve adequate or desired compression force on the seal member 130. This may reduce the number of turns of the bolt 162 required. This may also allow for a small overall axial length of the loading mechanism 160, which may in turn permit a shorter overall length for the enclosure assembly 50.
The anti-rotation feature 190 can allow the foregoing functionality of the loading mechanism 160 (including the floating spring plate 180) without requiring that the operator access and hold the spring plate 180 during installation.
Because the seal member 130 can be subsequently compresses, the channels 140 can be formed of large enough diameter to allow for relatively easy insertion of the cables 10. Cable insertion may also be facilitated by the self-lubricated material of the seal member 130.
A good seal can be formed about each cable 10 and between the seal member 130 and the base member 110 for an extended range of cable sizes. The quality of the seal can be made substantially consistent without regard for the size of the cable (within the prescribed range). The loading mechanism 160 allows for the seal member 130 to be customized to fit the cable 10. It is not necessary to mount a bushing, spacer or the like on the cable 10 in order to properly fit in the diameter of the cable to the channel 140. Cable of different sizes can be mounted in respective channels 140 of the seal member 130.
The security of the seal provided between the cable 10 and the seal member 130 can be augmented by the supplemental sealing pressure inducted by the loading mechanism 160. Accordingly, an improved seal can be provided to withstand greater pressure (e.g., water level).
The pressure applied to the cable 10 can be selectively set so that a good seal is provided, but the cable 10 is not overloaded or overcompressed. Such overloading may damage the cable 10, particularly in the case of optical fibers.
Cables can be inserted, removed, and re-inserted (the same or a different cable) into the channels 140. The loading mechanism 160 can be loosened to facilitate removal and re-insertion. Once re-inserted, the loading mechanism can be used to form an improved seal about the cable as described above.
According to some embodiments, other types of biasing members may be used in place of or in addition to a crest to crest continuous wave sprint. For example, the biasing member may include a coil spring, a Belleville washer, and elastomeric spring member, or a deformable containment structure (e.g., a bladder) filled with a compressible fluid. According to some embodiments, the biasing member includes a block of an elastomer. According to some embodiments, other types of seal members may be used. For, example, aspects of the present invention may be employed with seal members having nonbaffled passages and/or with non-elastomeric seal members (e.g., with a gel seal).
With reference to
While a cable 10 has been described above for the purposes of illustration, it will be appreciated that other elongate articles or objects may be sealed as well. For example, the sealing assemblies 100 may be used to form seals about mini tubes (e.g., fiber optic mini tubes).
Various modifications may be made to the devices and methods described above. For example, the base member 110 may include more or fewer sealing subassemblies 101. Each sealing subassembly 101 may be provided with more or fewer passages to receive more or fewer cable or other elongate objects. The shapes of the passages 140 may be changed to complement cable or other elongate objects of other cross-sectional shapes (e.g., square, oval, etc.).
Other arrangements of threaded members may be employed to selectively displace the pressure member 150. For example, the bolt 162 and threaded spring plate hole 187 may be replaced with a bold or threaded post secured to the spring plate 180 that extends forwardly through the seal member 130 and the pressure member 150, and a nut mounted on the threaded post and arranged to apply a load to the pressure member 150. According to some embodiments, other mechanisms, including non-threaded mechanisms, may be used to adjustably load the pressure member 150 and the spring plate 180.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof. Although a few exemplary embodiments of this invention have bee described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention. Therefore, it is to be understood that the forgoing is illustrative of the present invention and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments, as well as other embodiments, are intended to be included within the scope of the invention.
Mullaney, Julian, Radliff, David Ray
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Feb 14 2007 | RADLIFF, DAVID RAY | Tyco Electronics Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 018999 | /0904 | |
Mar 08 2007 | MULLANEY, JULIAN | Tyco Electronics Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 018999 | /0904 | |
Mar 12 2007 | Tyco Electronics Corporation | (assignment on the face of the patent) | / | |||
Apr 10 2015 | Tyco Electronics Corporation | TYCO ELECTRONICS SERVICES GmbH | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 036074 | /0740 | |
Aug 28 2015 | CommScope EMEA Limited | CommScope Technologies LLC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 037012 | /0001 | |
Aug 28 2015 | TYCO ELECTRONICS SERVICES GmbH | CommScope EMEA Limited | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 036956 | /0001 | |
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